{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{4}{c}}
\hline\hline
                    &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}&\multicolumn{1}{c}{(4)}\\
                    &\multicolumn{1}{c}{Capital per unit of output}&\multicolumn{1}{c}{log (Capital per unit of output)}&\multicolumn{1}{c}{Investment per unit of output}&\multicolumn{1}{c}{log (Investment per unit of output)}\\
\hline
log(labor)          &       325.0\sym{***}&        0.28\sym{***}&        83.6\sym{***}&        0.38\sym{***}\\
                    &      (65.4)         &     (0.028)         &      (15.7)         &     (0.032)         \\
\hline
Adjusted \(R^{2}\)  &       0.577         &       0.701         &       0.547         &       0.655         \\
Winsor              &         Yes         &          No         &         Yes         &          No         \\
Observations        &       23155         &       23155         &       23155         &       21604         \\
\hline              &                     &                     &                     &                     \\
State x Rural x Product FE&         Yes         &         Yes         &         Yes         &         Yes         \\
SE clusters:        &     Product         &     Product         &     Product         &     Product         \\
Number of Clusters  &         945         &         945         &         945         &         915         \\
Sample              &         ASI         &         ASI         &         ASI         &         ASI         \\
\hline\hline
\multicolumn{5}{l}{\footnotesize Standard errors in parentheses}\\
\multicolumn{5}{l}{\footnotesize \sym{*} \(p<0.10\), \sym{**} \(p<0.05\), \sym{***} \(p<0.01\)}\\
\end{tabular}
}
